EP2258057A1 - Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type - Google Patents

Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type

Info

Publication number
EP2258057A1
EP2258057A1 EP08735633A EP08735633A EP2258057A1 EP 2258057 A1 EP2258057 A1 EP 2258057A1 EP 08735633 A EP08735633 A EP 08735633A EP 08735633 A EP08735633 A EP 08735633A EP 2258057 A1 EP2258057 A1 EP 2258057A1
Authority
EP
European Patent Office
Prior art keywords
transmission
nodes
node
transmission section
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP08735633A
Other languages
German (de)
English (en)
Inventor
Kurt Hochleitner
Jaroslaw Kussyk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2258057A1 publication Critical patent/EP2258057A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2625—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using common wave

Definitions

  • the invention relates to a method and a device for adapting at least one communication link and a system comprising such a device.
  • a data unit or a data telegram (also referred to as "telegram") is transmitted by one or more senders in all directions at the same time and on the same frequencies.
  • a node also referred to as a station or network station
  • receives the data unit it is correspondingly, and if necessary, supplied to a destination in several retransmission steps or waves via other stations or nodes. Details concerning the common wave network can be found e.g. in [I].
  • the single-frequency network allows a transmission process from a source (source station) to a destination (destination station) - possibly over several
  • Transmission sections also referred to as hops
  • intermediate stations - only by an indication of the address the destination (s) and the number of retransmissions.
  • Transmission path (nabbalde) forward a data unit in the direction of destination. This results from the transmission channel as well as from different constellations of the common wave network.
  • the object of the invention is to avoid the above-mentioned disadvantages and in particular to provide an approach based on which in a single-frequency network, an advantageous adaptation of the signal transmission to the current conditions in individual
  • a method for adapting at least one transmission section in a single-frequency network is specified, wherein the common-frequency network comprises at least three nodes,
  • the adaptation may include: a change, a new setting, an initialization or a deletion of the transmission section.
  • a transmission section can be adapted starting from at least one node of the single-frequency network in the direction of the next node or in the direction of a plurality of next nodes.
  • the transmission section referred to herein may also comprise a transmission step.
  • the transmission section (transmission step) can be determined by at least one transmitter transmitting information, in particular a data unit, to at least one receiver.
  • Said nodes can therefore be connected to one another via parallel transmission sections or transmission steps.
  • a node can be connected via a further node with at least one destination node. Each such sub-connection may correspond to a transmission section or a transmission step.
  • a node of the common wave network may comprise a network component, a power consumption meter, a sensor, a load switching device, an automation device or the like. include or be associated with or associated with such.
  • the present approach provides a way to selectively adapt at least one transmission section or possibly several (or all) transmission sections of a communication connection from at least one node to at least one destination node. This allows the individual transmission sections in the Single-frequency network are suitably used according to their capabilities or characteristics.
  • the present approach is applicable to single-wired or wireless single-frequency networks, in particular using a standard-wave transmission technique (Gleichwellenfunk radio).
  • the single-frequency network referred to herein comprises several possibilities for the propagation of messages or
  • At least one node sends a data unit to at least one other node.
  • multiple transmitters may be provided, each transmitting a data unit to one or more receivers.
  • Such multiple transmitters transmit substantially simultaneously, i. in particular, while maintaining predetermined or predefinable time tolerances, the data unit to at least one receiver. It should be noted that the transmitter does not have to be complicated to synchronize with each other.
  • a receiver can retransmit a data unit received from the sender as soon as he is able to do so. It is not necessary that the data unit has been completely received; if necessary, a forwarding of the data unit can already be initiated as soon as only a part (for example a preamble) of the data unit has been received.
  • the receiver can also wait for the receipt of the complete data unit before forwarding it.
  • a data unit in the single-frequency network, can be transmitted from a node to a destination node via one or more nodes, each of the nodes, according to the principle explained above, the data unit forwards.
  • the propagation or transmission of the data units thus takes place over several transmission sections or in several transmission steps (or within several hops).
  • An adaptation of the at least one transmission section can take place alternately or in parallel according to the approach presented here on the basis of one or more nodes.
  • several masters may be provided for the adaptation of several transmission sections of the common wave network.
  • a development consists in that the at least two transmission sections comprise a point-to-multipoint connection. Alternatively or in addition to this, the at least two transmission sections may comprise a multipoint-to-point connection.
  • Communication link between two nodes has at least two transmission sections.
  • a development is that at least the at least one transmission section is optimized.
  • the at least one communication section includes
  • a predetermined criterion for example, a bit rate or the like
  • the best possible criterion for example, the best possible bit rate
  • the at least one transmission section is adapted starting from at least one node.
  • the first node (eg, as a master in the common wave network) may have a plurality of nodes Adapting a variety of connections with a variety of nodes.
  • Destination node or different to all destination nodes (broadcast).
  • the at least one transmission section is adapted by at least one transmission parameter, in particular a transmission rate and / or a transmission mode is adapted / be.
  • Transmission parameter is a multi-dimensional transmission parameter or includes a variety of properties and / or sizes.
  • the transmission sections each have at least one transmission parameter which is transmitted by at least one node, e.g. of at least one master, is adaptable.
  • the transmission parameter can thereby map and / or influence a multiplicity of different characteristics of the channel.
  • the transmission parameter can be used to forward information about the respective transmission section in a data unit or in a data telegram and / or to make a setting concerning at least one property of the transmission section for a transmission section.
  • the one transmission parameter is used that corresponds to a default.
  • a specification can be a threshold and / or a best value (eg in the context of the optimization).
  • the transmission parameter can be determined in an iterative method.
  • quantities and / or vectors are exchanged between the nodes of the common wave network.
  • the amounts and / or vectors per transmission section may comprise at least one transmission parameter.
  • the transmission parameter has a direction indication or orientation in the common wave network.
  • Transmission direction e.g. from a first node to a second node or vice versa, a corresponding (possibly different) adaptation is made.
  • At least one transmission section of the communication link is adapted taking into account at least one of the following criteria: a minimum transmission time;
  • a next embodiment is that the at least one transmission section of the communication connection is adapted taking into account a combination and / or a weighting of the at least one criterion.
  • the at least one transmission section of the communication connection is adapted taking into account at least one boundary condition.
  • a development consists in that the at least one transmission section of the communication connection is adapted by means of a feedback-free approach.
  • an adaptation can be made without explicitly making a negative confirmation.
  • a timer may be provided on the side of a node as an initiator for such an adaptation, the sequence of which indicates that an adaptation was not possible. Done one Confirmation from the remote station (possibly including the adaptation made), the initiator learns that the adaptation was successful.
  • An additional embodiment is that the at least one transmission section of the communication connection is adapted by means of a feedback approach.
  • the initiator of the adaptation can explicitly receive a feedback as to whether a proposed adaptation is possible or has taken place.
  • At least one node is a master station or a base station in the common wave network.
  • the transmission sections are adapted stepwise starting from at least one node in the direction of a transmission section and / or a destination (node).
  • a device for transmitting a data unit comprising a processor unit and / or an at least partially hardwired or logical circuit arrangement, which is set up such that the method can be carried out as described herein, is provided for achieving the above-mentioned object.
  • Said processor unit may be or include any type of processor or computer or computer with correspondingly necessary peripherals (memory, input / output interfaces, input devices, etc.). Such a processor unit can in particular in one
  • Communication device may be provided, which in particular has a transmitter, receiver (receiver) or a transceiver.
  • Circuit unit e.g. an FPGA or ASIC or other integrated circuit may be provided.
  • electronic, electromagnetic, acoustic or other elements may be provided to detect and / or process different signals.
  • the device may thus comprise a unit for parallel processing of signals and / or a unit for serial processing of signals.
  • the device may comprise or be embodied as: a measuring device, a diagnostic device, a counter, an information acquisition device, a control device, a direction finder and / or a corresponding system.
  • the device can be used in power engineering.
  • the signal comprises different physical quantities:
  • thermal size a mechanical (in particular a hydraulic or pneumatic) size
  • the device is a communication device, wherein the communication device exchanges signals with another communication device via a communication link which at least partially comprises a power network.
  • a system comprising a device as described herein.
  • Fig.l an example of a single-frequency network with several
  • Node wherein a propagation of a data unit or a data telegram from a source to a destination in the course of three transmission sections (hops) is shown;
  • FIG. 2 is a table for illustrating the time sequence of the sending and the spreading of
  • Such a common wave network preferably comprises a plurality of nodes (stations, Network elements), eg energy consumption meters, sensors, load switching devices, automation devices, etc.
  • a node in the common wave network (at least) a node is provided, which is designed as a master, i. from which a communication towards at least one other node of the common wave network (with a slave functionality) is initiated.
  • such a master can be a
  • the approach presented here makes it possible to determine or estimate a reception quality for individual (or several) data units (for example data telegrams).
  • the solution presented herein allows for adaptation of at least one communication link in a common wave network.
  • each point-to-point transmission and / or point-to-multipoint transmission and / or multipoint-to-multipoint transmission and / or multipoint-to-point transmission in a single-frequency network is at least a set or a vector
  • M S D ⁇ MsDl, M S D2, ..., M 3 Di, ..., M 3 DN ⁇
  • elements M SD i each containing information about a transmission mode (eg, a bit rate, a
  • Transmission type a channel assignment, a transmission power, a selected transmission line, etc.
  • i-th Transmission section or hop or partial transmission of the entire transmission from a source S to a destination D.
  • the source S and the destination D are nodes of the common wave network.
  • each point-to-point transmission in a single-frequency network can have at least two sets and / or vectors
  • M S D ⁇ MSDI, M S D2, ..., M 3 Di, ..., M SDN ⁇ and
  • M DS ⁇ MDS I, M DS 2 , ..., M DSD , ..., M DSM ⁇
  • elements M SDl and M DSD respectively, which respectively contain information about the transmission modes in the ith transmission section of the entire transmission from the source S to the destination D or in the j-th
  • Transmission step of the entire transmission from the destination D to the source S include.
  • the simulcast transmission over the entire propagation path from the source to at least one destination and possibly back to the Source adapted to the respective (current) conditions of the transmission channel.
  • the adaptation and / or optimization of the data transmission between the individual nodes of the single-frequency network is preferably carried out on the basis of the abovementioned vectors taking into account various criteria, e.g.
  • the adaptation and / or optimization of the data transmission network can take place, taking account of combinations of the above criteria, possibly with further criteria.
  • the criteria can still be weighted. It is also possible to take boundary conditions or parameters into consideration, eg a minimum data transmission quality or a maximum number of transmission sections N max and M 1 m IH a aX •
  • an adaptation and / or optimization taking into account a feedback take place, in which the source receives its own knowledge about a reception quality in the destination and then possibly the Vectors M SD and / or M DS suitable adapts.
  • the adaptation and / or optimization of individual vectors M SD and / or M DS in a central node of the single-frequency network eg in a network station, a master station or a base station, or distributed in individual nodes or network stations.
  • the source may also use that information of a destination that was determined when receiving data units for other destinations. This makes it possible, if necessary, to obtain advantageous assignments for the vectors M SD and / or M DS and thus to achieve certain synergy effects.
  • the adaptation and / or optimization of the data transmission by means of the vectors M SD and / or M DS can take place both during a construction or during an expansion or a reduction (reduction) of the network (establishing a connection to new nodes) as well as during ongoing data transmission ,
  • the presented method can, for example, be realized in a common wave network with a central station (master) for the successive extension or expansion of the transmission mode vectors M SD and / or M DS and comprise the following steps:
  • the master can try to optimize all connections to nodes within the first transmission section (so-called 1-hop connections).
  • the individual transmission mode vectors M SD and / or M DS each comprise only one element M SD i or M DS i.
  • M DS ⁇ MDSI, MDS 2 ⁇ to the respective targets (nodes with slave functionality) takes place based on information coming from the previous optimization (see a.).
  • the second elements M SD 2 and M DS 2 of the vectors M SD and M DS are adapted, for example, by trying all possible transmission modes.
  • This procedure can be used iteratively in the single-frequency network up to the number of maximum possible transmission sections (maximum number of transmission sections N max and M max in the vectors M SD and M DS ). It is also possible to continue this approach until all connections from the master to all potential targets have been established.
  • each destination can receive data units directed from the master to other destinations or from other destinations to the master.
  • the information obtained regarding the reception quality and the corresponding vectors M SD and M DS , which are transmitted in data units, can thus be stored by the destination.
  • Fig. 1 shows an example of a simulcast transmission from a source 0 to a destination 8 comprising three transmission sections (hops).
  • a data telegram is sent from the source 0 in a transmission mode M 0 8 i. Due to the physical conditions of the transmission medium, the data telegram is transmitted in a second transmission section from the nodes 2 and 3 and in a third transmission section from the nodes 2, 3, 5 and 6 forwarded to the destination 8.
  • Fig. 2 shows a table comprising the nodes 0 to 8 as columns and the transmission sections (hops) 1 to 3 as rows.
  • the table shows the time sequence of the transmission modes M 0 8 i to M 0 83 used for transmission.
  • "Rx" designates a successful data telegram reception in a node.
  • the approach described above permits adaptation and / or optimization of individual point-to-point connections and / or point-to-multipoint connections and / or multipoint-to-multipoint connections and / or multipoint-to-point connections in a single-frequency network with a large number of subscribers and thus a nearly optimal and robust adaptation of the common-frequency network to a transmission medium with location-dependent and / or time-dependent properties.
  • a further advantage is that the information for adapting or optimizing the connections can be obtained (almost) without an interruption of the data transmission, and thus can be efficiently saved further network resources. It is also possible to use the proposed method in networks that also support multi-hop relaying as a single-frequency network.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé d'adaptation d'au moins une partie de transmission dans un réseau à fréquence unique qui comporte au moins trois noeuds. Selon l'invention, les trois noeuds sont reliés au moyen d'au moins deux parties de transmission dont une au moins est adaptée. L'invention porte également sur un dispositif correspondant et sur un système comportant un dispositif de ce type.
EP08735633A 2008-04-01 2008-04-01 Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type Ceased EP2258057A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/053857 WO2009121397A1 (fr) 2008-04-01 2008-04-01 Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type

Publications (1)

Publication Number Publication Date
EP2258057A1 true EP2258057A1 (fr) 2010-12-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735633A Ceased EP2258057A1 (fr) 2008-04-01 2008-04-01 Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type

Country Status (2)

Country Link
EP (1) EP2258057A1 (fr)
WO (1) WO2009121397A1 (fr)

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
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DE3244256A1 (de) * 1982-11-30 1984-05-30 Robert Bosch Gmbh, 7000 Stuttgart Fm-gleichwellenfunksystem
DE19914324C1 (de) * 1999-03-30 2001-01-11 Iad Gmbh Kommunikationssystem zur Datenübertragung in einem vermaschten Netzwerk unter Verwendung eines Verfahrens mit Muliträgerübertragung
DE10241959A1 (de) * 2002-09-10 2004-03-11 Siemens Ag Verfahren zur Signalübertragung in einem Funk-Kommunikationssystem
DE10301556B4 (de) * 2003-01-16 2012-03-01 IAD Gesellschaft für Informatik, Automatisierung und Datenverarbeitung mbH Verfahren zur Gleichwellenübertragung und Gleichwellenfunksystem oder drahtgebundenes Gleichwellenübertragungssystem mit räumlich verteilt angeordneten Gleichwellensendern
DE10342040A1 (de) * 2003-09-11 2005-04-07 Rohde & Schwarz Gmbh & Co Kg Verfahren zur Überwachung der Zeitsynchronität von Sendern in einem Gleichwellennetz
CN101512935B (zh) * 2006-07-27 2013-10-30 艾利森电话股份有限公司 通过多个发射机进行分层广播发射
US7570916B2 (en) * 2006-08-22 2009-08-04 Motorola, Inc. Method and apparatus for providing and obtaining broadcast multicast service feedback

Non-Patent Citations (2)

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DEERING CISCO R HINDEN NOKIA S: "Internet Protocol, Version 6 (IPv6) Specification; rfc2460.txt", 19981201, 1 December 1998 (1998-12-01), XP015008244, ISSN: 0000-0003 *
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Also Published As

Publication number Publication date
WO2009121397A1 (fr) 2009-10-08

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